Cash register



Aug. 1, 1933. c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13-, 1927 5 Sheets-Sheet 1lllulmlmlr.

altotnurv 1933- c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Sheets-Sheet 2 Charles (0.Green,

Aug. l, 1933.' c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Sheets-Sheet 3 Z5 Charles(1/. Greezb Aug. 1, 1933. c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Shets-Sheet 4 lnue'ntorChar/ea 11/. Green,

1933- c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Sheets-Sheet 5 IN VEN TOR.

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Patented Aug. 1, 1933 UNITED STATES PATENT OFFICE assignments, to theNational Cash Register Company, Dayton, Ohio, a Corporation of MarylandOriginal application April 13, 1927, Serial No. 183,392. Divided andthis application May 17,

1930. Serial No. 453,163-

9 Claims. (Cl. 235-130) This invention relates to shutter and resettingmechanisms and the embodiment selected for the purpose of illustrationis particularly adapted for use in cash registers, although it issusceptible of ready adaptation for use in other types of accountingmachines and analogous devices.

This application is a division of the application of Charles W. Green,Serial No. 183,392, filed April 13, 1927, to which application referencemay be had for a complete disclosure of the mechanisms not shown herein.

An object of the present invention is to provide a totalizer unit whichis normally concealed from view so that reading and resetting of thesame is normally prevented.

Another object is to provide a control lever which when moved to acertain position of adjustment will cause the totalizer to be exposed toview and further permit the insertion of a key for the purpose ofresetting the totalizer wheels to zero.

Another object is to provide a-resetting mechanism which is adapted toreset the totalizer by rotating the totalizer elements in the samedirection as they are rotated for item accumulation.

Another object of the present invention is to provide means forrestoring the tripped transfer pawls to ineffective position afterresetting of the totalizer elements has been effected.

A more specific object of the present invention is to provide a shutterwhich normally conceals the totalizer, and a plate mounted adjacent theside of the cabinet which normally covers an opening for the resettingkey; these elements being adapted to be moved to inoperative position bya control lever to respectively expose the totalizer and permitresetting thereof.

Another object of the invention is to provide a totalizer resettingmechanism well adapted by simplicity of construction and easy operationto facilitate resetting operations when desired.

Other and further objects of the invention will become apparent as thedescription of the invention progresses.

Reference will now be had to the drawings, in which,

'Fig. 1 is a perspective view of the machine to which the presentinvention is applied, showing particularly the arrangement of theoperating keys. This view also shows the adjustable lever for exercisingcontrol over the machine, as well as the opening through which thetotals may be read.

Fig. 2 is a sectional view of the machine, taken substantially throughits mid-portion. This view and is designated as the No sale key 31.

shows particularly the differential and totalizing devices and the meanswhereby they may be brought into and out of cooperative relationship.

Fig. 3 is a view in side elevation showing the control lever in one ofits positions of adjustment. This view also shows a portion of theresetting devices.

Fig. 4 is a top plan view of a number of the elements associated withthe controlling devices for the machine.

Fig. 5 is a top plan view of the machine, the cabinet being cut away toshow the arrangement of the mechanisms located within. This view showssubstantially all of the devices utilized for registering and indicatingoperations as controlled by the various operating keys.

Fig. 6 is a view in side elevation of a portion of the mechanismsutilized to prevent or allow resetting operations. This view also showsthe lock for locking the control lever in its adjusted position.

Fig. '7 is a cross sectional view of the totalizer showing the transfermechanism.

Fig. 8 is a detail. of the lowest order transfer operating cam.

Fig. 9 is a view in side elevation showing the position that the partsassume when a transfer is to be effected.

Fig. 10 is a detail of certan parts which serve to restore the transferpawls during resetting.

Fig. 11 is a view of the key utilized to perform resetting operations.

The illustrative machine is provided with keys 32 divided into groups,one group for registering amounts from 1 to 9, another group forregistering amounts ranging from 10 to 90, and a third group forregistering values of $1.00 to $9.00. Obviously more amount keys can beprovided if desired. A special key is also provided The amount keys 32and the No sale key 31 .are pivoted upon a shaft 33 supported by theside plates 20 and 21. The amount keys 32 and the No sale key 31 whichcarry at the front portions of the levers suitable key caps bearingindicia designating the nature of the keys play in slots 28 formed inthe cabinet. At their rear ends the keys are guided by slots 35 formedin a plate 36 secured to a cross bar 25 by any suitable means, such forexample as screws 27. All of the keys are provided with notches 38adapted to receive the rearward end of the key coupler 39 which extendsbetween the side plates 20 and 21 and which rests upon the rear end ofthe keys. The coupler is pivotally supported by means of plates and 41attached to the key coupler and which are suitably apertured to receivea shaft 42 which is located in substantially the mid-portion of themachine. Shaft 42 is supported by side plates 20 and 21 in a mannersimilar to the shaft 33. It will be obvious that when the forward endsof the operating keys are depressed the key coupler 39 will be rockedclockwise so that its rearward end will enter the notches 38 of thedepressed keys. The purpose of such key coupler mechanism is well knownin the art, and need not be discussed herein.

It is essential that some device be provided to insure a completeperformance of the started registration before a second operation cansubsequently be effected. As this mechanism forms no part of the presentinvention, it is unnecessary to describe this mechanism specifically.For a full disclosure thereof reference may be had to the parentapplication.

The rear ends of the keys are formed with upstanding projections 46, theforward edges of which are substantially concentric with respect to thekey coupler supporting shaft 42. When the key coupler is being operatedthe rearward end thereof. will pass in front of the concentric portionof the unoperated keys, thereby locking them against. movement. Sincethis mechanism is well known in the, art it need not be discussed hereinin further detail.

Differential mechanism The differential mechanisms or devices controlledby the various groups of keys for entering the desired amounts in thetotalizers are all similar in construction and principle of operation,and a description of one will suffice for all. The differential deviceassociated with the dollars bank of keys is shown in Fig. 2 wherein itwill be noted that mounted upon the shaft 42 is a frame comprisingparallel side plates 47 integrally joined by cross bar or bail 48 whichnormally stands over the projections 46 of the keys of the dollars bank.The frame just described is attached to the shaft 42 by a pin 49 shownin Fig. 5. Also attached to the shaft 42 at substantially its midportion is a segmental rack 50 adapted to operate the dollars element ofthe totalizer devices, to be described hereinafter in detail. As will benoted from Fig. 3 the rearward portions of the upstanding projections 46of the keys of a group are suitably cut away so as to form steps 51which are at different distances from the cross bar 48. Graduations aredirectly in the path of cross bar 48, the consequence being that whenthe keys are depressed a lost motion is effected between the keys andthe frame but at a certain time the step 51 of the depressed key willcoact with the frame to operate it and in this manner a differentialmovement is given to the frame depending upon the key depressed. All ofthe keys of the dollars bank have the same extent of movement and sincein this manner the rack 50 will be operated differentially theassociated totalizer element will be operated correspondingly.

The differential frame associated with the cents bank of keys is shownin Fig. 5 and denoted by reference character 52, this frame beingloosely mounted upon shaft 42 and one of the side plates of the framehas attached thereto a cents operated rack 53. The nine keys associatedwith the cent bank are provided with differential graduations similar tothose described in connection with the dollars bank of keys. Framemember 54 associated with the dimes bank of keys is also shown in Fig. 5and is loosely mounted upon the joined together by a cross-rod 57 toprovide an I additional control whereby overthrow of the frame isprevented. It will be seen in Fig. 2 that directly over the keysupporting shaft 33 the keys are provided with upstanding portions 58the upper edges of which are at different heights so as to providedifferential steps which are complementary with respect to the steps 51.From this construction it follows that as the key is depressed aprojection 51 will operate with the cross-bar 48 rocking the framedifferentially until the rod 57 engages the upstanding portion 58 of thedepressed key, at which time the frame will be positively lockedinasmuch as the graduations of the keys cooperate with opposite sides ofthe differential frame. This locking action takes place at substantiallythe termination of the down stroke of the keys at which time thedifferentially operated racks will thus also be held in their adjustedpositions. It will also be noted that the forward edges of theupstanding projections 58 are concentric with respect to the shaft 42 sothat cross-rod 57 coacts with the step of the operated key. There willbe no interference between the cross-rod 57 and the upstanding portions58 of the nonoperated keys of the bank. A similar overthrow preventingmeans is provided for each bank of keys so that upon depression of thekeys of the different banks the frames and associated racks will not becarried beyond the positions which they are intended to assume.

A suitable totalizer engaging mechanism is also provided, but inasmuchas this mechanism forms no part of the present invention a detaileddescription thereof is unnecessary. It may be said,

however, that the totalizer is thrown into engagement with thedifferential racks at substantially the beginning of the downwardmovement of the keys and is disengaged from said racks at substantiallythe beginning of the return stroke of the keys. For a detaileddescription of this mechanism reference may be had to the parentapplication.

Transfer mechanism The transfer mechanism employed for the totalizerwheels above the units order is of the type of which the several ordersare independently and successively actuated and it is operated upon thereturn stroke of the keys at which time the totalizer pinions are out ofmesh with their respective actuators.

Each totalizer wheel carries a pin 115 whichis in the plane of anextension 116 of a spring urged transfer trip pawl 117 provided with astepped shoulder 118. The transfer pawls 120 are urged counter clockwiseby coil springs 128 so that normally a lug 121 formed thereon rests uponthe shoulder 118. Each transfer pawl is pivotally mounted on a relatedarm 122, all of which are journalled on a shaft 123 carried by a pair ofears formed on a supporting bar 124 securely fixed between the sideframes 71 and 72 of the totalizer. When a totalizer wheel of a higherorder makes a complete revolution a pin 115 will urge a trans: fer trippawl forwardly thereby disengaging the lug 121 from shoulder 118permitting the spring 128 to throw the pawl downwardly until the bottomedge of transfer pawl rests upon supporting bar 124. At this time theengaging end of a transfer pawl will be brought into operativeengagement with a tooth of a ratchet wheel 125 attached to the pinion ofthe next higher order wheel so that when the transfer pawl is movedrearwardly cooperation of the pawl with the ratchet wheel will advancethis wheel to effect the necessary transfer. In so doing the transferpawl will also be raised due to the camming action of the next ratchettooth so that lug 121 will again rest on the shoulder 118. When a pawl117 is tripped or forced forward by a transfer pin 115, as abovedescribed, the transfer pawl 120 will be released and will be drawndownwardly by the coil spring 128, but if they should move downwardlytoo slowly or by any means become stuck in their elevated position theyare positively forced downwardly by pins 1171, carried by the trip pawlsand adapted to engage the upper edge of the transfer pawls. The tail ofthe pawl 120 is bent to form a lug 119 which is adapted to cooperatewith the short edge of the arm 122 and is provided for the purpose ofpreventing said pawl from being out of engagement with the ratchet teethat the end of the extreme rearward travel of said pawl with the resultthat overthrow due to a too rapid transfer operation is prevented.

The upper edge of the transfer pawl 120 is preferably notched at 1200 sothat at the extreme end of the transfer operation the pin 1171 willoverlie the notch 1200, the upper end of the pawl 117 having followedthe pawl 120 rearward in the operation of the latter. This permits lug119 to function as an overthrow preventer alone, but if so desired thenotch 1 200 and lug 119 may be dispensed with so that pin 1171 coactingwith the upper straight edge of pawl 120 will prevent overthrow.

The means whereby the'transfer pawls are successively actuated so as toefiect the necessary transfers, comprises a series of links 126 eachconnected to a related arm 122 and slotted so as to engage and rest uponthe oscillating transfer shaft 97. Upon the shaft 97 are secured aplurality of transfer cams 127 which are spirally arranged so as toactuate the links of the different denominational orders seriatim. Eachcam 127 is in the plane of a pin 129 carried by its associated link 126.During the downward stroke of the keys the transfer shaft 97 will firstbe rocked counter clockwise by means fully described in my aboveidentified parent application, and by the cooperation of the cams 127with the pins 129 the several links 126 will be successively elevatedthus rocking about their points of pivotal connection with levers 122the links 126 being guided by the cooperation of concentric edges 130 ofthe link with the shaft 97 until the cams clear the pins whereupon thelinks will drop to their normal position. During the return stroke ofthe keys the cams 127 will engage the opposite sides of the pins 129thereby forcing the links forwardly, the latter being guided in theirmovements by the slotted portions above fingers 131 engaging the shaft97. In this manner each of the transfer pawls will be actuated and thosethat have been tripped will effect transfers. When the cam 127 clearsthe pin 129 the coil spring 128 connected between the arm 122 and itsassociated transfer pawl will return the parts to normal. It will benoted that as the cam 127 moves the link 126 forwardly to force thetransfer pawl rearwardly the ends of the spring will be brought togetherthus storing up additional energy in the coil spring 128' and thisenergy is released when the cam 127 leaves the pin 129. Since the link126 by moving the arm 122 stores up energy in spring 128 this energywill be expended ,to return pawl 120, arm 122 and link 126, when thelatter is released from cam 127. When the link 126 is released theenergy in the spring 128 will tend to rock the pawl 120 counterclockwise, but since the' pawl already contacts a stationary member theenergy will be used to rock arm 122 clockwise thus forcing arm 126rearwardly and pawl 120 forwardly.

It will be observed from what has been just stated that the upwardmovement of the links 126 is produced by the carp. 127 during thedownward movement of the keys, and that after each cam 127 is entirelydisengaged from the related pin 129 the weight of the link is dependedupon to restore it to its lower position where it rests upon the shaft97 so that shortly after this the reverse movement of the cam 127 willforce the-link forwardly to effect a transfer. In rapid operations ofthe machine the weight of the member 126 may not be sufficient torestore it to its normal condi tion prior to return movement of earn127. In.

order to prevent any misoperations a tension device which is common tothe links 126 is provided and comprises a member 132 which is looselypivoted on the tie rod 69 and is urged clockwise by a spring 133 so thatbent extensions 134 thereof cooperate with the upper rearward edges ofall of the links 126.

It will also be observed that the cam 127, as-

sociated with the transfer elements between the units and dimesdenominational orders is of a different contour than the other cams, inthat a considerable portion of its outer periphery isconcentric withrespect to the shaft 97 so that at the beginning of the operation of theshaft the high concentric portion of this cam will almost immediatelycoact with the pin 129 of the related link 126 and will raise the leverand hold it elevated for a considerableperiod. Since one of theextensions 134 coacts with the upper side of this link it will rock themember 132 upwardly against the tension in the spring 135 and willretain it in this position until the operated key reaches close to theend of its downward stroke. This construction prevents a ratchetingeffect which would otherwise occur as the pins 129 of the several links126 successively drop from the high portions of their related cams 127.When the pin 129 leaves the outer concentric part of cam 127 of thelowest denominational order, the member 132 is released, so that thespring 133 will urge it downwardly and if one of the links 126 should beheld elevated due to friction the related extension 134 will urge itdownwardly to its normal position. This insures the restoration of thelinks to their normal position prior to their short move ments and itwill be apparent that by this means the danger of the portions 131coacting with the shaft 97 will be minimized if not altogether obviated.The spring 133 is tensioned only during the down stroke of the keys whenthe most power is available. Since the projections 134 are a slightdistance above the links 126 during the return stroke of the keys thespring 133 will have no action on the arms 126 and will therefore notplace any additional load on the machine at a time when the least poweris available.

It will be observed that a transfer pawl and related device are providedfor all of the wheels of denominational orders higher than the unitsorder and the several orders from lower to higher are operatedsuccessively so that at the end of an operation of the machine thetransfer pawls will all have been operated and by thus completing thenecessary transfers the totalizing wheels will indicate the true sumregistered.

Machine control In the type of machine shown in the drawings it is acommon expedient to provide means whereby the keys are locked againstoperation while the cash drawer is exposed, and thus the operator isforced to close the cash drawer at the end of each operation so as notto leave the money contained thereinexposed between operations of themachine.

In certain uses of the machine it is desirable to disable the mechanismjust described so as to permit successive operations of the machineduring rush hours without closing the cash drawer after each operation.Again, it is desirable at times to lock the operating keys irrespectiveof the position of the cash drawer so as to prevent tampering byunauthorized persons. To provide for these functions the mechanismembodied in the illustrative machine is placed under the control of asingle lever which may be operated from the exterior of the machine butwhich may be locked so that the movement of the lever cannot beperformed except by persons having the key to the lock. The controllever is adapted to be shifted to any one of three positions toaccomplish a corresponding one of the functions above mentioned. Themechanism for effecting the various functions of the control leverstated above forms no part of the present invention and consequently adetailed description thereof is unnecessary. The parent application maybe referred to for a full disclosure of this mechanism.

Total and reset position of the control lever At the termination of thedays business or any other selected period it is desirable to obtain thetotal of the sales registered so that receipts may readily be checkedand after the total has been obtained resetting of the totalizers mayfollow. During this procedure it is desirable to obtain access to thecontents of the cash drawer and to provide for all of the abovefunctions the necessary control over the machine is effected by thecontrol lever 180 when moved to the rearmost ,or Total and Resetposition. It will be observed from Figs. 2 and 4 that the totalizerelements bear characters which may be viewed through an aperture 191formed in the cabinet and also an aperture formed in a denominationaldesignating plate 192. When the control lever is out of the Total andReset position reading of the totalizer elements is prevented by meansof a shutter 193 which is pivoted to the side plates 71 and 72 of thetotalizer frame. Attached to a shaft 181 is an upstanding arm 194provided with a pin engaging a closed slot formed in a link 195. Theslot formed in the link 195, connected to one arm of shutter 193, is ofsufficient length so that movement of the control lever to any of thethree foremost positions will not operate the link 195 to move theshutter, but when the lever is moved to the Total and Reset" positionthe link will be drawn rearwardly against the tension of a spring 196thereby rocking the shutter 193 to permit the resetting of the totalizerelements.

It is desirable that the control lever be aligned in its variouspositions when adjusted and to this end there is attached. to thecontrol lever 180 a link 197 which is connected to a segment plate 198pivoted to the side frame 20 by a stud 199. The segment plate 198 isprovided with a plurality of aligning notches 200 adapted to engage astud carried by the spring pawl 201. By this means it will be obviousthat the control lever is held frictionally in any adjusted position,but by projecting the bolt of a lock 202, which lock is controlled byinsertion of a key, through the cabinet 27 the control lever may belocked in any one of its adjusted positions. As shown, the bolt of lock202 when projected engages 9. lug on the pawl 201 and prevents it fromrocking as would be required to shift the lever 180. It is alsodesirable to lock the amount keys when the control lever is in the Totaland Reset position. For this purpose, it will be noted that when thecontrol lever is moved to this position the shaft 181 will be rockedcounter clockwise from the position shown and through the spring 190 thelocking lever 188 will be moved so that its shoulder 189 passes over thekey coupler 39.

In order to release the cash drawer when the control lever is moved tothe Total and Reset position it will be noted in this operation that anarm 185 will be moved sufficiently to cause a projection 203 formedthereon to contact with a stud 204 carried by the drawer catch releaselever 170 rocking it suficiently so'that it will release the cashdrawer. This then constitutes a manual means for releasing the cashdrawer independently of an operation of the machine and it may be usedfor this purpose when the machine H5 may for some reason become disabledand locked up after the coupler has been partially operated.

Resetting devices Resetting in the present machine is accom- 0 plishedby manually rotating the shaft 74 so that the square shoulder of agroove 205 formed therein will cooperate with resetting or pick-up pawls206 carried by the totalizer elements. Thus. when the shaft 7 is rotatedin the proper direction the groove therein will cooperate with thepick-up pawl 206 in whatever position the pawls happen to be in andcarry them and the connected totalizer elements to their normalpositions.

It will be noted that the relation between the groove and the pawls issuch that the wheels of the totalizer are restored by rotation of theshaft 74 in the same direction in which they are driven by theactuators, so that by this construction the numeral wheels are free torotate about shaft 74 in adding operations without causing any movementof the shaft. The shaft 74 has connected to it a resetting bar 207 whichfits loosely in an aperture formed in a bracket 208 attached to the sideframe 20. The connection betweenthe bar 207 and the shaft 74 is formedby inserting the bar in a slot in the shaft and passing a pin throughthem, thus providing a swivel connection, and is such that in the normalposition of the parts, the totalizer is free to be rocked into and outof mesh with the racks. The cabinet 27 and side plate 20 are bothprovided with apertures 2081 through which the stem of a resetting key209 is adapted to be inserted so that by the cooperation of a slot 210formed in the end of 150 the key 209 with the end of bar 207 the shaft74 may be rotated to reset the totalizer elements. In all positions ofthe control lever, with the exception of the Total and Reset position,an aperture 2081 in the plate 20 is closed by an integral portion of thesegment plate 198. When the control lever is brought to Total and Resetposition, however, a cut away portion 211 will be brought to registerwith the opening 2081. The plate 198 is formed with bent lugs 212 whichare adapted to guide a pin 213 on the resetting key. The lugs 212 arealso adapted to prevent any rotation of the bar 207 by the resetting keyuntil the key is fully inserted, at which time the pin 213 of the keywill be in its proper position within the side plate 20. Rotation of theresetting key will rotate the bar 207 and shaft 74 to zeroize thetotalizer elements it being understood that cooperation of the pin 213with the side plate 20 will prevent withdrawal of the key until the keyis again brought to its normal position.

In resetting operations the totalizer elements are driven by the shaft74 in the same direction as the actuators drive them. It will be furtherapparent that during resetting operations the trip pins 115 carried bythe wheels will cooperate with the trip pawls 117 and trip the latter asin adding operations. For this reason it is necessary to restore thetripped transfer pawls to their normal inactive positions, otherwiseirregular transfers would be eifected during the first subsequentoperation of the machine. The shaft 74 has attached thereto a cam 214which is in the plane of one arm of a bell crank 216 pivoted on the sideplate 68 of the totalizer frame. The other arm of the bell crank 216carries apin 217 engaging a bifurcation in an arm 218 attached to ashaft 219 journalled in ears integral with the cross bar 124. A coilspring 220 acting between a fixed stud and the pin 217 urges the arm 216against the periphery of the cam 214. 'The shaft 219 is provided with aplurality of slots 221 adapted to receive and guide the transfer pawls120, as well as to restore them. after they have been tripped during aresetting operation.

The operation of the foregoing mechanism may now be briefly pointed out.When resetting commences by manual rotation of the insertion of theresetting key a counter clockwise rotation of shaft 74 will cause thegroove 205 to pick up the variously positioned pawls 206 to restore thetotalizer elements. During the counter clockwise rotation of the shaft74 the periphery of the cam 214 will cooperate with the arm 216 andgradually rock the latter and through the connections previouslydescribed, comprising the pin .217 and arm 218, will rock the slottedshaft 219 clockwise. This rotation of the shaft will carry the slots 221away from the transfer pawls 120 and will present the total periphery ofthe shaft to these pawls tending to rock them slightly upwardly; the lug121 at this time coacting with and sliding along the upper rearward edgeof the trip pawl 117. When the highest part of the cam 214 contacts thearm 216 the transfer pawls will be elevated to their highest positionsand by the continued counter clockwise rotation of the shaft 74 willreversely rock the bell crank 216 and 3 the shaft 219 will rock counterclockwise back to normal, thus permitting the transfer pawls 120 to belowered. At substantially the end of a counter clockwise rotation of theshaft 74 all of the totalizer elements will be passing from their 9 totheir positions, at which time the trip pins 115 will cooperate with thetrip pawls 117 releasing all the transfer pawls 120 in the same mannerthat they are released during a rocking transfer operation.

At this time rotation of the shaft 74 will be stopped by the cooperationof an integral extension 222 of the bar 207 with a pin 223 carried bythe bracket 208. Since the shaft 74 is not given a complete rotation thepin 213 of the resetting key 209 will not be in alignment with thesquare cut of the notch 2081 in the machine side frame so that theresetting key cannot be withdrawn until the shaft 74 is rotatedreversely. Reserve rotation of shaft 74 will, in the form of embodimentshown, restore the tripped transfer pawls, but this operation will haveno effect on the totalizer elements which are at this time in their zeropositions. As the shaft 74 is thus rotated reversely, or in a clockwisedirection, it will rock the shaft 219 first clockwise and, since at thistime the transfer pawls have been released so that the lugs 121 aredisengaged from the shoulders 118 and the pawls rest upon the supportingbar 124, the bottom of the slots 221 will have a caming effect upon andwill elevate the transfer pawls until thelugs 121 are above the shoulder118. At this time the transfer trip pawls 116 will be urged by theirsprings to their normal positions. When the high part of the cam 214 isreached continued clockwise rotation of shaft 74 will permit the shaft219 to be restored to normal, thereby lowering the transfer pawls 120slightly until the lugs 121 again engage the shoulders 118 of thetransfer trip pawls 117. At the termination of the resetting operationthe transfer mechanism is again in the position permitting transferringto be performed in the regular manner, and at the end of this operationthe resetting key is withdrawn from the machine.

While the form of mechanism herein described is admirably adapted tofulfill the objects primarily stated it is to be understood that it isnot intended to confine the invention to the one form of embodimentherein shown, since it may be embodied in various forms, all comingwithin the scope of the claims which follow.

What is claimed is:

1. In a cash register, the combination of a totalizer, a plurality ofoperating keys adapted to insert items in the totalizer, said totalizercomprising a plurality of readable totalizer elements, a shutternormally concealing said elements from view, a manually operable devicefor restoring the totalizer elements to zero, means comprising a platefor normally preventing operation of the manually operable device, meansfor locking the operating keys, and a single, manually operable controllever for simultaneously operating the keylocking means and moving theshutter and plate to ineffective position.

2. In a cash register, the combination of totalizer elements, atotalizer shutter adapted to prevent viewing of the totalizer elements,a manually operable control lever having various positions of adjustmentand directly connected to the shutter to move the same when adjustedtoone position, and a lock controlled arm for aligning and locking thecontrol lever in its different positions of adjustment.

3. In a machine of the class described, a plurality of totalizerelements, means for actuating the same to accumulate items therein, aseries of transfer pawls, means for resetting said totalizer elements byrotating the same in the same direction as they are rotated during itemaccumulation, means causing tripping of said pawls during a resettingoperation, and means for restoring said pawls to ineffective position.

4. In a machine of the class described, a plurality of totalizerelements, a shutter normally concealing the same, a shaft supportingsaid totalizer elements, means normally preventing access to said shaft,a manually operable control lever, means for moving said shutter andpreventing means to inoperative position when the control lever is movedto one position of adjustment, an g lever cooperating with thepreventing means, and a lock, acting through the aligning lever, toretain the control lever-in any position of adjustment.

5. In a piece of the class described, a plurality of totalizer elements,a shutter normally concealing the same, a totalizer shaft, a plate normpreventing access to said shaft, means for moving said shutter and plateto inoperative position, an insertible reset key for rotating said shaftto reset said totalizer elements, and means provided on said plate toguide the key while being inserted.

6. in a device of the class described, a totalizer having transferdevices normally in ineffective position, zeroizing means for saidtotalizer, means whereby zeroizing of said totalizer places said devicesin active position, and means whereby reverse movement of said zeroizingmeans restores said devices to ineffective position.

'2'. In a device of the class described, a totalizer having transferpawls and a resetting shaft, means whereby resetting movement of saidshaft causes tripping of said transfer pawls, and means whereby reverserotation of said shaft after said totalizer has been reset restores saidpawls to normal position.

8. In a machine of the class described, a totalizer having resettingmeans, a resetting device for engaging said means and adapted to berotated when so engaged, a blocking member, and means on the deviceadapted to engage the blocking member when the device is rotated apredetermined distance in one direction, to necessitate a reverserotation of the device before the same can be disengaged from theresetting means.

9. In a machine of the class described, a totalizer having resettingmeans, a resetting device for engaging said means and adapted to berotated when so engaged, a blocking member, and means on the deviceadapted to engage the blocking member when the device is rotated apredetermined distance in one direction, to necessitate an 1 equalreverse rotation of the device before the same can be disengaged fromthe resetting means.

CLES W. GREEN.

